wich one? saitek x52 or x52pro

[PilotError]

Originally Posted by swiss

The question is: Is that spring worth $30-40?

The spring isn't worth the extra money, but the pro is.

Just to clarify, the extra spring on the pro gives the stick a better feel, but that is not what makes it more responsive.
If I remember correctly the pro is supposed to have twice as many sensors (or possibly sensors twice as good ?).
When I changed from the standard X52 to the pro I found it was much easier to control an aircraft with just small movements of the stick, especially near the center.
I definitely found it easier to keep the crosshairs on an enemy plane using the pro.

So, yes, the pro is worth the extra cost IMHO.